316 Stainless Steel Submersible Sewage Pump with 400 m³/h Flow and 37 kW Motor for Wastewater Drainage

The 200WQP400-20-37KW-4 is a large-flow 316 stainless steel submersible sewage pump designed for wastewater discharge, industrial wastewater treatment, municipal drainage, construction dewatering, and other applications requiring high-volume liquid transfer.

This model is designed for a rated flow of 400 m³/h, a head of 20 m, and a motor power of 37 kW. The pump is manufactured with 316 stainless steel, providing excellent corrosion resistance for demanding wastewater and industrial drainage environments.

As a WQP series submersible sewage pump, the unit can be installed directly in the liquid. Its submersible design helps simplify installation and reduces the need for a conventional dry pump room and long suction pipelines.

Excellent Corrosion Resistance: 316 stainless steel contains molybdenum, which provides better resistance to pitting and corrosion than many conventional stainless steel grades. This makes it suitable for wastewater treatment, industrial drainage and applications where the pumped liquid may have a certain level of corrosiveness.

Suitable for Industrial Wastewater: Industrial wastewater can contain complex chemical components and suspended solids. The 316 stainless steel construction provides improved material resistance for demanding industrial pumping systems. The final material selection should always be based on the actual chemical composition and operating conditions of the liquid.

Designed for Submersible Operation: The pump and motor are designed for submerged installation. The pump can be installed in a sewage sump, collection tank, drainage pit or wastewater tank, helping simplify the overall pumping system.

The 200WQP400-20-37KW-4 is designed for a flow rate of 400 m³/h, making it suitable for large-volume drainage and wastewater transfer applications.

With a rated head of 20 m, this model is suitable for systems requiring relatively high flow at a moderate pumping head.

The 200WQP400-20-37KW-4 uses a submersible pump structure. When operating, the pump is immersed in the liquid and the rotating impeller generates centrifugal force to draw liquid into the pump and discharge it through the outlet pipeline.

The submersible configuration eliminates many of the suction-side requirements associated with conventional surface-mounted pumps.

It is suitable for installation in:

• Sewage collection tanks
• Wastewater sumps
• Drainage pits
• Municipal pumping stations
• Industrial wastewater tanks
• Construction drainage systems

Proper submersible sewage pump selection should consider several key operating parameters:

• Required Flow Rate: Determine the actual amount of wastewater that needs to be transferred. For this model, the reference rated flow is 400 m³/h.
• Required Head: The model is designed for a 20 m rated head. However, the actual total dynamic head should be calculated based on the vertical lifting height and pipeline friction losses.
• Pumped Liquid: Identify the liquid being pumped, such as municipal sewage, industrial wastewater, drainage water or other contaminated liquids.
• Solid Particle Size: If the wastewater contains solid particles, fibers or debris, the particle size and concentration should be provided so the appropriate pump configuration can be selected.
• Material Requirements: For relatively corrosive wastewater or applications requiring enhanced corrosion resistance, 316 stainless steel can be considered as a suitable material option, subject to chemical compatibility.

Material selection is an important consideration when pumping industrial wastewater or other demanding liquids.

The 200WQP400-20-37KW-4 combines:

• 400 m³/h large flow
• 20 m rated head
• 37 kW motor power
• 316 stainless steel construction
• Submersible installation
• Large-volume wastewater pumping capability

This configuration makes it a potential solution for industrial wastewater, municipal drainage, wastewater treatment and large-scale dewatering projects.

To recommend the correct submersible sewage pump, buyers should provide the following information:

• Required flow rate: m³/h
• Required head: m
• Pumped liquid
• Liquid temperature
• Solid particle size
• Solid concentration
• Chemical composition or corrosiveness
• Voltage
• Frequency
• Installation method
• Pipeline length
• Discharge pipe diameter
• Continuous or intermittent operation
• Project location and operating environment
• Required pump material

Based on these parameters, the pump model, motor power, material and electrical configuration can be confirmed more accurately.